The teaser trailer for the Naomi Watts-starring, Diana, Princess of Wales biopic has been released.

Directed by Oliver Hirschbiegel (Downfall), Diana looks at the last two years of Diana, Princess of Wales' life.

It will be released in cinemas on Friday September 20.

Watts has said she is "excited and honoured to be playing the role of a truly remarkable woman, who had such a positive and profound impact in so many ways".